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Debt (Schedule Of Debt) (Detail) - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 30, 2016
Debt Instrument [Line Items]    
Total debt $ 612.3 $ 619.9
Less: Short-term debt 147.3 130.3
Long-term debt 465.0 489.6
Uncommitted Facilities [Member]    
Debt Instrument [Line Items]    
Total debt 147.0 130.0
Senior Notes [Member]    
Debt Instrument [Line Items]    
Principal amount 400.0 400.0
Unamortized discount on Notes (2.3) (2.5)
Debt issuance costs (2.3) (2.4)
Note Payable Fair Value 431.0 410.6
Promissory Notes And Other Debt [Member]    
Debt Instrument [Line Items]    
Principal amount 0.6 0.5
Total debt 0.9 0.8
Note Payable Fair Value 0.9 0.8
2014 Credit Facility [Member] | Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Total debt $ 69.0 $ 94.0